Securing the Fuel Supply Chain for Microreactors

Radiant Industries is making significant strides in its fuel fabrication and testing strategy for the Kaleidos transportable microreactor. The company has signed a long-term agreement with Standard Nuclear for TRISO fuel fabrication, ensuring a steady supply of advanced nuclear fuel to support Kaleidos microreactor deployment through the early 2030s.

TRISO Fuel Delivery and Manufacturing

Under the agreement with Standard Nuclear, multiple tonnes of TRISO (Tristructural Isotropic) fuel will be delivered by 2031. This specialized fuel utilizes HALEU supplied by the Department of Energy and is essential for the high-temperature gas-cooled design of the Kaleidos reactor. The fuel consists of ceramic-coated particles embedded in a graphite matrix, providing exceptional safety and performance characteristics under extreme conditions.

Radiant received its first TRISO test fuel at the INL DOME facility in July 2026, marking a critical milestone in its development timeline.

Accelerated Testing at Idaho National Laboratory

Following the receipt of its initial test fuel in July 2026, Radiant shipped the material to the Idaho National Laboratory (INL) in August 2026. The fuel will undergo a rigorous five-phase DOME test campaign to validate its performance and safety margins. This testing is a prerequisite for the broader commercial deployment of the Kaleidos system.

Regulatory and DOE Support

Parallel to its fuel fabrication efforts, Radiant continues to advance its regulatory and government support initiatives. The company was selected by the DOE in April 2025 to receive HALEU allocations and was subsequently chosen for the Reactor Pilot Program in August 2025. Additionally, Radiant's Part 70 license application for a reactor production facility in Oak Ridge, Tennessee, is currently undergoing an accelerated review by the Nuclear Regulatory Commission, paving the way for domestic manufacturing and deployment.

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